Due A4988 4wire stepper

Using Arduino Motors, Mechanics, Power and CNC
4

I know which wires go to which coil. That’s not the issue. The issue is getting the sketches to run the motor. I have had every possible combination of your diagram wired up. Ran the enable high then low. Nothing. Jumped the reset to the sleep and still nothing. I’ve tried all 5 drivers and no good. The stepper is a very old small 3.5v unit. I’m thinking I have an old or incapable library in my sketch. I found this library that I’m going to try
// testing a stepper motor with a Pololu A4988 driver board or equivalent

// on an Uno the onboard led will flash with each step

// this version uses delay() to manage timing

byte directionPin = 9;
byte stepPin = 8;
int numberOfSteps = 100;
byte ledPin = 13;
int pulseWidthMicros = 20; // microseconds
int millisbetweenSteps = 250; // milliseconds - or try 1000 for slower steps

void setup() {

Serial.begin(9600);
Serial.println("Starting StepperTest");
digitalWrite(ledPin, LOW);

delay(2000);

pinMode(directionPin, OUTPUT);
pinMode(stepPin, OUTPUT);
pinMode(ledPin, OUTPUT);

digitalWrite(directionPin, HIGH);
for(int n = 0; n < numberOfSteps; n++) {
digitalWrite(stepPin, HIGH);
delayMicroseconds(pulseWidthMicros); // this line is probably unnecessary

digitalWrite(stepPin, LOW);

delay(millisbetweenSteps);

digitalWrite(ledPin, !digitalRead(ledPin));
}

delay(3000);

digitalWrite(directionPin, LOW);
for(int n = 0; n < numberOfSteps; n++) {
digitalWrite(stepPin, HIGH);
// delayMicroseconds(pulseWidthMicros); // probably not needed

digitalWrite(stepPin, LOW);

delay(millisbetweenSteps);

digitalWrite(ledPin, !digitalRead(ledPin));
}
}

void loop() {